Engineer&#39;s cab-signal.



F. M. GREENE.. EN'GINEERS -cAB SIGNAL. ffPLlcAT'loN min APR. 15. 1914.1,229,178. v PatentedJune 5, 1917.

2 SHEETS-SHEET 1.

F5- M. GREENEqU ENGINEERS CAS SIGNAL. APPLlCATlYON FILED APR.15, i914.

Patented June 5, 1917.

msm 'i l A N i, l' f" STATES 4rA'rEirr OFFICE;

FRANK n. GREENE, or MINNEAPOLIS, irrNNEso'rA.

, ENorNEEns cnn-'SIGNAL .Lezama To all whomz't may concern;

.Beit knownthat I, FRANK Ms: GREENE, a citizen of the United States,resident of Minneapolis, Hennepin county, Minnesota,

have invented certain new and'useful Improvements in EngineersCab-Signals, of which the following is a specification.

The object of imy invention is to provide a signal adapted for luse on alocomotive for the purpose ofindicating to the engineer if the track it-zlear, or if caution should beI exercised, or operatmg 'under certainconditibns to release the airl from the brake cylinders and set thebrakes.

The invention consiste generally in vari- Vous constructions andcombinations, all as hereinafter described pointed out in the claims.

In the accompanyingpart of this specification,

Figure 1 is an elevation illustrating the and particularly drawingsforming manner of supporting. the signal device by the` track and itsposition with respect to theV engineers cab,

' Fig."2 is a detail sectional view, showing the connection with. lthesignaling mechamsm 1n the cab,

Fig. 3 is a perspective view, showing the means for mounting the signalactuating de- 'vice on the posts at the side of the trac Fig. i is adetail sectional view of the controlling valve, l

In the drawing, 2 represents a railway track of ordinary construction, 3a locomotive having a cab t thereon of ordinary construction, and 5represent each side of the track. 6 is a rod, which may be connected tothe operating mechanim cfa semaphore to be operated simultaneouslytherewith, Bell cranks 7 are pivoted 8 and have one arm attachedto the irod 6 and the other to rods 9 which extend .diy opposite the posts 5andare piv- "nnected to levers 10 which in turn d at 1l en upper ends ofthe have short arms carrying weights arms for supportano' a wire 13 o rthe 'track and has yieldch as springs 14, with ing certeral the leversif). in 'i' means ot il* lfounted on preferably two sections, ivoted at1t en the normally hel in its raised position by a spring 17 and adatdto swing in a guide 18 having ay1e1l posts mounted on i p d PatentedJune 5, 1917.. Application led April 15, 1914. erial No. 881,952.

guidel. A series of dogs 21, 22 and 23 are pivoted at one endon theguide 15 and4 the dogs 21 and 22 have pivotal slidin r vconnectio'nswith the barV 20,-by means o slots 24 and 25 therein.V The dog 23 has apivotal, 'non-sliding connection 26 with the bar 20. The do s projectbeyond the` bar 2O on p one side an are adapted to swing-upward whenstruck by an object in the path of the dogs.V The lower end of the-.bar20 is pivotally connected to a link 27, that is attached at one end to acrank 28 that is mounted on a Vvalve 29 provided witha port 30 therein,A springl normally holds this valve in its closed positionand cuts ofi'the flow of air through the pipe 32 to the whistle 33. When the valve ismoved a short distance, a small 'volume of air will pass through thevalve to the whistle, which volurne will be increased as the valve isopent-il wider, until the whistle is bein blown its fullest extent.lThis sound o the whistrack. The wire' 13 will be dropped down to apoint where it will engage with the dog 21,

'the movement of the parts being sotimed that this'do will swing andmove-the bar 20, a short istance, vsuflicient, however, to

partially vopen 4the valve 29 and allow air4 4 to'ow to the whistle, thesound of the whistle indicating to the engineer that the track is clear,If the 'actuating wire 13 should be dropped down lower by the movementof the semaphore, where it `will operate the dog 22, then the valve 29'will be opened a greater distance and a-larger volume of air will flowto the whistle and a louder signal will be sounded, and when theoperating wire is dropped down to a point where it will engage with thedog 23, the valve will bethrown wide open an the air will be releasedfrom the train pipe to the` brake cylbrakes. The second signal will begenerally utilized toindicate caution, and warn the engineer that thereis danger ahead, while the third signal is a positlve indication of daner and through the automatic setting of t e brakes the engineer will beositively'prevented from going ahead with 's train, or by the dangersignal of the semaphore. 'y

In v'anous ways the details of construction heroin shown-'and describedmay' be 4inders suicient to automatically set the.

modified and still' be within the scope of my invention.

I claim as m invention: 1. The com ination, with an en 'neers cab andasignalin device mounted t erein, of means mounte o n said cab andoperatively connected with saids'ignaling device',

sure to said signal,asl1ding member pro-.

jectin above said caband operatively conn ecte with said valve to openthe same, a series of pivoted dogs connected with said member, themovement of one of said dogs opening said Vvalve a predetermineddistance toindicate caution and the other dog opening the valve 'agreater distance to indicate danger, .and means supported above thetrack and extending across the same and adapted to be moved into thepath of said dogs respectively for actuating the same.

tive position, an engineers signaling -said visual signal o eratedmeans, saidV mechanism including evices operable independently of one.'another for operating a predetermined si a1.

4. A railway signal t'comprising anhactuating element supported abovethe track for movement4 from an inoperative to an era- 'dgvice mounted`in the cab, a releasing mechanism connected therewith com risingmembers to be actuated for indicating a clea'r track, caution, ordanger, and arranged to pass beneath said actuating-element to beoperated selectively throughl the adjustment of sai-d actuating elementfor sounding the desired signal in the cab.

In witness whereof, have hereunto setmy hand this 28th, da of March,1914.

y FR NK M. GREENE. Witnesses:

GENEVIEVE E. SoRENsEN, EDWARD A. PAUL.

